WIP: Add canvas zoom/pan/pinch event handlers - handlers deployed but zoom interaction not working yet, will debug later

Mode2Svelte/src/routes/+layout.svelte

@@ -7,6 +7,7 @@
 
 <svelte:head>
 	<link rel="icon" href={favicon} />
+	<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
 </svelte:head>
 
 {@render children()}

Mode2Svelte/src/routes/+page.svelte

@@ -65,12 +65,14 @@
 
   const getSvgIcon = (iconType: string): string => {
     const icons: {[key: string]: string} = {
-      pdf: `<svg fill="none" stroke="currentColor" viewBox="0 0 24 24" style="width:16px;height:16px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z"></path><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6M9 16h6"></path></svg>`,
-      doc: `<svg fill="none" stroke="currentColor" viewBox="0 0 24 24" style="width:16px;height:16px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"></path></svg>`,
-      sheet: `<svg fill="none" stroke="currentColor" viewBox="0 0 24 24" style="width:16px;height:16px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 17v-2m3 2v-4m3 4v-6m2-10H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V5a2 2 0 00-2-2z"></path></svg>`,
-      presentation: `<svg fill="none" stroke="currentColor" viewBox="0 0 24 24" style="width:16px;height:16px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 4v16m10 0V4m3-2H4a2 2 0 00-2 2v16a2 2 0 002 2h16a2 2 0 002-2V4a2 2 0 00-2-2z"></path></svg>`,
-      image: `<svg fill="none" stroke="currentColor" viewBox="0 0 24 24" style="width:16px;height:16px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z"></path></svg>`,
-      file: `<svg fill="none" stroke="currentColor" viewBox="0 0 24 24" style="width:16px;height:16px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"></path></svg>`,
+      pdf: `<svg viewBox="0 0 24 24" fill="none" style="width:16px;height:16px;"><rect fill="#D32F2F" width="24" height="24" rx="2"/><text x="12" y="16" font-size="10" font-weight="bold" fill="white" text-anchor="middle">PDF</text></svg>`,
+      doc: `<svg viewBox="0 0 24 24" fill="none" style="width:16px;height:16px;"><rect fill="#2B579A" width="24" height="24" rx="2"/><text x="12" y="16" font-size="10" font-weight="bold" fill="white" text-anchor="middle">W</text></svg>`,
+      sheet: `<svg viewBox="0 0 24 24" fill="none" style="width:16px;height:16px;"><rect fill="#217346" width="24" height="24" rx="2"/><text x="12" y="16" font-size="10" font-weight="bold" fill="white" text-anchor="middle">X</text></svg>`,
+      presentation: `<svg viewBox="0 0 24 24" fill="none" style="width:16px;height:16px;"><rect fill="#D35230" width="24" height="24" rx="2"/><text x="12" y="16" font-size="10" font-weight="bold" fill="white" text-anchor="middle">P</text></svg>`,
+      image: `<svg fill="none" stroke="currentColor" viewBox="0 0 24 24" style="width:16px;height:16px;color:#6b7280;"><rect x="2" y="2" width="20" height="20" rx="2"/><circle cx="8" cy="8" r="2"/><path d="M21 15l-5-5L5 21"/></svg>`,
+      zip: `<svg viewBox="0 0 24 24" fill="currentColor" style="width:16px;height:16px;color:#6b7280;"><path d="M19 3H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm0 16H5V5h14v14zm-5-9h-3v4h3v-4zm0-3h-3v2h3V7z"/></svg>`,
+      text: `<svg viewBox="0 0 24 24" fill="currentColor" style="width:16px;height:16px;color:#6b7280;"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8l-6-6z"/><path d="M16 13H8M16 17H8M10 9H8"/></svg>`,
+      file: `<svg viewBox="0 0 24 24" fill="currentColor" style="width:16px;height:16px;color:#6b7280;"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8l-6-6z"/></svg>`,
     };
     return icons[iconType] || icons.file;
   };
@@ -91,6 +93,399 @@
     }
   };
 
+  const canPreviewInline = (name: string, contentType: string = ''): boolean => {
+    const ext = (name || '').toLowerCase().split('.').pop();
+    const type = (contentType || '').toLowerCase();
+    return ext === 'pdf' || type.includes('pdf') || 
+           ['doc', 'docx'].includes(ext as string) || type.includes('word') ||
+           ['jpg', 'jpeg', 'png', 'gif', 'svg', 'bmp'].includes(ext as string) || type.includes('image');
+  };
+
+  const renderPdfPage = async () => {
+    if (!currentPdf || !currentPdf.doc) return;
+    
+    const pageObj = await currentPdf.doc.getPage(currentPdf.page);
+    const viewport = pageObj.getViewport({ scale: currentPdf.scale });
+    const canvas = document.getElementById('pdfCanvas') as HTMLCanvasElement;
+    if (!canvas) return;
+    
+    const context = canvas.getContext('2d');
+    if (!context) return;
+    
+    canvas.height = viewport.height;
+    canvas.width = viewport.width;
+    
+    await pageObj.render({
+      canvasContext: context,
+      viewport: viewport,
+    }).promise;
+  };
+
+  const renderImageOnCanvas = () => {
+    if (!currentPdf?.imageElement) return;
+    const canvas = document.getElementById('pdfCanvas') as HTMLCanvasElement;
+    if (!canvas) return;
+    
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+    
+    const scale = currentPdf.scale;
+    canvas.width = (currentPdf.imageWidth || 0) * scale;
+    canvas.height = (currentPdf.imageHeight || 0) * scale;
+    
+    ctx.drawImage(currentPdf.imageElement, 0, 0, canvas.width, canvas.height);
+  };
+
+  const updateZoomLabel = () => {
+    const label = document.getElementById('pdfZoomLabel');
+    if (label && currentPdf) {
+      label.textContent = `${Math.round(currentPdf.scale * 100)}%`;
+    }
+  };
+
+  const setupCanvasEventHandlers = () => {
+    const canvas = document.getElementById('pdfCanvas') as HTMLCanvasElement;
+    if (!canvas) return;
+
+    // Zoom buttons
+    const zoomOutBtn = document.getElementById('pdfZoomOut');
+    const zoomResetBtn = document.getElementById('pdfZoomReset');
+    const zoomInBtn = document.getElementById('pdfZoomIn');
+
+    if (zoomOutBtn) {
+      zoomOutBtn.addEventListener('click', async () => {
+        if (!currentPdf) return;
+        currentPdf.scale = Math.max(MIN_PDF_SCALE, currentPdf.scale - 0.1);
+        pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+        canvas.style.transform = 'translate(0px, 0px)';
+        if (currentPdf.isImage) {
+          renderImageOnCanvas();
+        } else {
+          await renderPdfPage();
+        }
+        updateZoomLabel();
+      });
+    }
+
+    if (zoomResetBtn) {
+      zoomResetBtn.addEventListener('click', async () => {
+        if (!currentPdf) return;
+        currentPdf.scale = DEFAULT_PDF_SCALE;
+        pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+        canvas.style.transform = 'translate(0px, 0px)';
+        if (currentPdf.isImage) {
+          renderImageOnCanvas();
+        } else {
+          await renderPdfPage();
+        }
+        updateZoomLabel();
+      });
+    }
+
+    if (zoomInBtn) {
+      zoomInBtn.addEventListener('click', async () => {
+        if (!currentPdf) return;
+        currentPdf.scale = Math.min(MAX_PDF_SCALE, currentPdf.scale + 0.1);
+        pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+        canvas.style.transform = 'translate(0px, 0px)';
+        if (currentPdf.isImage) {
+          renderImageOnCanvas();
+        } else {
+          await renderPdfPage();
+        }
+        updateZoomLabel();
+      });
+    }
+
+    // Page navigation buttons (if multi-page)
+    const prevBtn = document.getElementById('pdfPrev');
+    const nextBtn = document.getElementById('pdfNext');
+
+    if (prevBtn) {
+      prevBtn.addEventListener('click', async () => {
+        if (!currentPdf || currentPdf.page <= 1) return;
+        currentPdf.page--;
+        pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+        canvas.style.transform = 'translate(0px, 0px)';
+        await renderPdfPage();
+        document.getElementById('pdfPageNum')!.textContent = String(currentPdf.page);
+      });
+    }
+
+    if (nextBtn) {
+      nextBtn.addEventListener('click', async () => {
+        if (!currentPdf || currentPdf.page >= currentPdf.pages) return;
+        currentPdf.page++;
+        pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+        canvas.style.transform = 'translate(0px, 0px)';
+        await renderPdfPage();
+        document.getElementById('pdfPageNum')!.textContent = String(currentPdf.page);
+      });
+    }
+
+    // Canvas pan (mouse drag)
+    canvas.addEventListener('mousedown', (e) => {
+      pdfPan.dragging = true;
+      pdfPan.startX = e.clientX;
+      pdfPan.startY = e.clientY;
+      canvas.style.cursor = 'grabbing';
+    });
+
+    canvas.addEventListener('mousemove', (e) => {
+      if (!pdfPan.dragging) return;
+      const dx = e.clientX - pdfPan.startX;
+      const dy = e.clientY - pdfPan.startY;
+      pdfPan.x = pdfPan.baseX + dx;
+      pdfPan.y = pdfPan.baseY + dy;
+      canvas.style.transform = `translate(${pdfPan.x}px, ${pdfPan.y}px)`;
+    });
+
+    canvas.addEventListener('mouseup', () => {
+      if (pdfPan.dragging) {
+        pdfPan.baseX = pdfPan.x;
+        pdfPan.baseY = pdfPan.y;
+        pdfPan.dragging = false;
+        canvas.style.cursor = 'grab';
+      }
+    });
+
+    canvas.addEventListener('mouseleave', () => {
+      if (pdfPan.dragging) {
+        pdfPan.baseX = pdfPan.x;
+        pdfPan.baseY = pdfPan.y;
+        pdfPan.dragging = false;
+        canvas.style.cursor = 'grab';
+      }
+    });
+
+    // Pinch zoom (touch)
+    let lastDistance = 0;
+    canvas.addEventListener('touchstart', (e) => {
+      if (e.touches.length === 2) {
+        const dx = e.touches[0].clientX - e.touches[1].clientX;
+        const dy = e.touches[0].clientY - e.touches[1].clientY;
+        lastDistance = Math.sqrt(dx * dx + dy * dy);
+      } else if (e.touches.length === 1) {
+        pdfPan.dragging = true;
+        pdfPan.startX = e.touches[0].clientX;
+        pdfPan.startY = e.touches[0].clientY;
+      }
+    });
+
+    canvas.addEventListener('touchmove', async (e) => {
+      if (e.touches.length === 2) {
+        e.preventDefault();
+        const dx = e.touches[0].clientX - e.touches[1].clientX;
+        const dy = e.touches[0].clientY - e.touches[1].clientY;
+        const distance = Math.sqrt(dx * dx + dy * dy);
+        if (lastDistance > 0) {
+          const scaleDelta = (distance - lastDistance) / 100;
+          const newScale = currentPdf ? currentPdf.scale + scaleDelta : DEFAULT_PDF_SCALE;
+          if (currentPdf) {
+            currentPdf.scale = Math.max(MIN_PDF_SCALE, Math.min(MAX_PDF_SCALE, newScale));
+            if (currentPdf.isImage) {
+              renderImageOnCanvas();
+            } else {
+              await renderPdfPage();
+            }
+            updateZoomLabel();
+          }
+        }
+        lastDistance = distance;
+      } else if (e.touches.length === 1 && pdfPan.dragging) {
+        const dx = e.touches[0].clientX - pdfPan.startX;
+        const dy = e.touches[0].clientY - pdfPan.startY;
+        pdfPan.x = pdfPan.baseX + dx;
+        pdfPan.y = pdfPan.baseY + dy;
+        const canvas = document.getElementById('pdfCanvas') as HTMLCanvasElement;
+        if (canvas) {
+          canvas.style.transform = `translate(${pdfPan.x}px, ${pdfPan.y}px)`;
+        }
+      }
+    });
+
+    canvas.addEventListener('touchend', () => {
+      pdfPan.baseX = pdfPan.x;
+      pdfPan.baseY = pdfPan.y;
+      pdfPan.dragging = false;
+      lastDistance = 0;
+    });
+
+    // Wheel zoom (mouse scroll)
+    canvas.addEventListener('wheel', async (e) => {
+      e.preventDefault();
+      if (!currentPdf) return;
+      const zoomDelta = e.deltaY > 0 ? -0.1 : 0.1;
+      currentPdf.scale = Math.max(MIN_PDF_SCALE, Math.min(MAX_PDF_SCALE, currentPdf.scale + zoomDelta));
+      if (currentPdf.isImage) {
+        renderImageOnCanvas();
+      } else {
+        await renderPdfPage();
+      }
+      updateZoomLabel();
+    }, { passive: false });
+  };
+
+
+  // Setup canvas event handlers for zoom, pan, and pinch
+  const setupPdfControls = () => {
+    const zoomInBtn = document.getElementById('pdfZoomInBtn') as HTMLButtonElement;
+    const zoomOutBtn = document.getElementById('pdfZoomOutBtn') as HTMLButtonElement;
+    const zoomResetBtn = document.getElementById('pdfZoomResetBtn') as HTMLButtonElement;
+    const canvas = document.getElementById('pdfCanvas') as HTMLCanvasElement;
+
+    if (!canvas) return;
+
+    const applyPan = () => {
+      canvas.style.transform = `translate(${pdfPan.x}px, ${pdfPan.y}px)`;
+    };
+
+    const activePointers = new Map<number, {x: number; y: number}>();
+    let pinchStartDistance: number | null = null;
+    let pinchStartScale: number | null = null;
+
+    const distanceBetween = () => {
+      if (activePointers.size < 2) return null;
+      const pts = Array.from(activePointers.values());
+      const a = pts[0];
+      const b = pts[1];
+      const dx = a.x - b.x;
+      const dy = a.y - b.y;
+      return Math.hypot(dx, dy);
+    };
+
+    // Zoom button handlers
+    if (zoomInBtn) {
+      zoomInBtn.addEventListener('click', async () => {
+        if (!currentPdf) return;
+        currentPdf.scale = Math.min(currentPdf.scale + 0.1, MAX_PDF_SCALE);
+        if (currentPdf.isImage) {
+          renderImageOnCanvas();
+        } else {
+          await renderPdfPage();
+        }
+      });
+    }
+
+    if (zoomOutBtn) {
+      zoomOutBtn.addEventListener('click', async () => {
+        if (!currentPdf) return;
+        currentPdf.scale = Math.max(currentPdf.scale - 0.1, MIN_PDF_SCALE);
+        if (currentPdf.isImage) {
+          renderImageOnCanvas();
+        } else {
+          await renderPdfPage();
+        }
+      });
+    }
+
+    if (zoomResetBtn) {
+      zoomResetBtn.addEventListener('click', async () => {
+        if (!currentPdf) return;
+        currentPdf.scale = currentPdf.isImage ? 1 : DEFAULT_PDF_SCALE;
+        pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+        canvas.style.transform = 'translate(0px, 0px)';
+        if (currentPdf.isImage) {
+          renderImageOnCanvas();
+        } else {
+          await renderPdfPage();
+        }
+      });
+    }
+
+    // Canvas event handlers
+    canvas.style.touchAction = 'none';
+
+    canvas.addEventListener('wheel', async (e) => {
+      if (!currentPdf) return;
+      e.preventDefault();
+      const delta = e.deltaY;
+      const step = 0.1;
+      if (delta < 0) {
+        currentPdf.scale = Math.min(currentPdf.scale + step, MAX_PDF_SCALE);
+      } else {
+        currentPdf.scale = Math.max(currentPdf.scale - step, MIN_PDF_SCALE);
+      }
+      if (currentPdf.isImage) {
+        renderImageOnCanvas();
+      } else {
+        await renderPdfPage();
+      }
+    }, { passive: false });
+
+    canvas.addEventListener('pointerdown', (e) => {
+      if (!currentPdf) return;
+      activePointers.set(e.pointerId, { x: e.clientX, y: e.clientY });
+
+      if (activePointers.size === 2) {
+        pinchStartDistance = distanceBetween();
+        pinchStartScale = currentPdf.scale;
+        pdfPan.dragging = false;
+      } else if (activePointers.size === 1) {
+        pdfPan.dragging = true;
+        pdfPan.startX = e.clientX;
+        pdfPan.startY = e.clientY;
+        pdfPan.baseX = pdfPan.x;
+        pdfPan.baseY = pdfPan.y;
+        canvas.style.cursor = 'grabbing';
+      }
+
+      canvas.setPointerCapture(e.pointerId);
+    });
+
+    canvas.addEventListener('pointermove', (e) => {
+      if (!currentPdf) return;
+
+      if (activePointers.has(e.pointerId)) {
+        activePointers.set(e.pointerId, { x: e.clientX, y: e.clientY });
+      }
+
+      if (activePointers.size >= 2 && pinchStartDistance) {
+        const dist = distanceBetween();
+        if (dist) {
+          const scale = pinchStartScale! * (dist / pinchStartDistance);
+          currentPdf.scale = Math.min(Math.max(scale, MIN_PDF_SCALE), MAX_PDF_SCALE);
+          if (currentPdf.isImage) {
+            renderImageOnCanvas();
+          } else {
+            renderPdfPage();
+          }
+        }
+        return;
+      }
+
+      if (!pdfPan.dragging) return;
+      const dx = e.clientX - pdfPan.startX;
+      const dy = e.clientY - pdfPan.startY;
+      pdfPan.x = pdfPan.baseX + dx;
+      pdfPan.y = pdfPan.baseY + dy;
+      applyPan();
+    });
+
+    const endPan = (e: PointerEvent) => {
+      if (activePointers.has(e.pointerId)) {
+        activePointers.delete(e.pointerId);
+      }
+
+      if (activePointers.size < 2) {
+        pinchStartDistance = null;
+        pinchStartScale = null;
+      }
+
+      if (activePointers.size === 0) {
+        pdfPan.dragging = false;
+        canvas.style.cursor = 'grab';
+      }
+
+      try {
+        canvas.releasePointerCapture(e.pointerId);
+      } catch {}
+    };
+
+    canvas.addEventListener('pointerup', endPan);
+    canvas.addEventListener('pointercancel', endPan);
+  };
+
   // Search and filters
   let searchQuery = '';
   let showFiltersPanel = false;
@@ -111,6 +506,15 @@
   let showFileViewer = false;
   let currentViewerFile: any = null;
   let graphToken = '';
+  
+  // PDF/Image viewer state
+  let currentPreviewUrl: string | null = null;
+  let currentPdf: {doc: any; page: number; pages: number; scale: number; isImage?: boolean; imageElement?: HTMLImageElement; imageWidth?: number; imageHeight?: number} | null = null;
+  let pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+  let showPdfViewer = false;
+  const DEFAULT_PDF_SCALE = 0.45;
+  const MIN_PDF_SCALE = 0.3;
+  const MAX_PDF_SCALE = 3.0;
   let graphTokenExpiry: number | null = null; // Expiration timestamp in ms
   let graphTokenRefreshTimer: NodeJS.Timeout | null = null; // Background refresh timer
 
@@ -487,11 +891,108 @@
     currentViewerFile = file;
     showFileViewer = true;
     showDetailModal = false;
+    
+    // Try to preview in canvas if supported
+    const ext = (file.name || '').toLowerCase().split('.').pop();
+    if (canPreviewInline(file.name, file.contentType || '')) {
+      loadFilePreview(file);
+    }
+  }
+
+  async function loadFilePreview(file: any) {
+    if (!file.url) return;
+    
+    try {
+      let fetchUrl = '';
+      
+      // Use backend proxy endpoints instead of direct SharePoint URLs
+      const ext = (file.name || '').toLowerCase().split('.').pop();
+      const isWordDoc = ['doc', 'docx'].includes(ext as string) || file.contentType?.includes('word');
+      const isPdf = ext === 'pdf' || file.contentType?.includes('pdf');
+      
+      if (file.driveId && file.id) {
+        // Use proxy endpoints with Graph API
+        if (isWordDoc) {
+          fetchUrl = `/api/file-pdf?driveId=${encodeURIComponent(file.driveId)}&itemId=${encodeURIComponent(file.id)}`;
+        } else {
+          fetchUrl = `/api/file-content?driveId=${encodeURIComponent(file.driveId)}&itemId=${encodeURIComponent(file.id)}`;
+        }
+      } else {
+        // Fallback to direct URL (for non-SharePoint files)
+        fetchUrl = file.url;
+      }
+      
+      const response = await fetch(fetchUrl, {
+        headers: graphToken ? { 'x-graph-token': graphToken } : {},
+      });
+      
+      if (!response.ok) throw new Error(`Failed to fetch file: ${response.status}`);
+      
+      const blob = await response.blob();
+      if (currentPreviewUrl) {
+        URL.revokeObjectURL(currentPreviewUrl);
+      }
+      currentPreviewUrl = URL.createObjectURL(blob);
+      
+      const isImage = ['jpg', 'jpeg', 'png', 'gif', 'svg', 'bmp'].includes(ext as string) || file.contentType?.includes('image');
+      
+      if ((isPdf || isWordDoc) && (window as any).pdfjsLib) {
+        const data = await blob.arrayBuffer();
+        const pdfjsLib = (window as any).pdfjsLib;
+        pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.worker.min.js';
+        
+        const doc = await pdfjsLib.getDocument({ data }).promise;
+        currentPdf = {
+          doc,
+          page: 1,
+          pages: doc.numPages,
+          scale: DEFAULT_PDF_SCALE,
+        };
+        pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+        showPdfViewer = true;
+        
+        // Render first page and setup controls
+        await new Promise(resolve => setTimeout(resolve, 100));
+        await renderPdfPage();
+        updateZoomLabel();
+        setupCanvasEventHandlers();
+      } else if (isImage) {
+        const img = new Image();
+        img.onload = async () => {
+          currentPdf = {
+            doc: null,
+            page: 1,
+            pages: 1,
+            scale: 1,
+            isImage: true,
+            imageElement: img,
+            imageWidth: img.width,
+            imageHeight: img.height,
+          };
+          pdfPan = { x: 0, y: 0, dragging: false, startX: 0, startY: 0, baseX: 0, baseY: 0 };
+          showPdfViewer = true;
+          
+          await new Promise(resolve => setTimeout(resolve, 100));
+          renderImageOnCanvas();
+          updateZoomLabel();
+          setupCanvasEventHandlers();
+        };
+        img.src = currentPreviewUrl;
+      }
+    } catch (err) {
+      console.error('Preview load error:', err);
+    }
   }
 
   function closeFileViewer() {
     showFileViewer = false;
+    showPdfViewer = false;
     currentViewerFile = null;
+    currentPdf = null;
+    if (currentPreviewUrl) {
+      URL.revokeObjectURL(currentPreviewUrl);
+      currentPreviewUrl = null;
+    }
     showDetailModal = true;
   }
 
@@ -967,8 +1468,50 @@
     </div>
 
     <!-- Viewer Content -->
-    <div style="flex: 1; overflow: auto; background: #000; display: flex; align-items: center; justify-content: center;">
-      {#if currentViewerFile.url}
+    <div style="flex: 1; overflow: auto; background: #000; display: flex; align-items: center; justify-content: center; flex-direction: column;">
+      {#if showPdfViewer && currentPdf}
+        <!-- PDF/Image Controls -->
+        <div style="background: #1f2937; color: white; width: 100%; padding: 8px 12px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid #374151; flex-shrink: 0;">
+          <div style="display: flex; align-items: center; gap: 6px;">
+            <button
+              id="pdfZoomOutBtn"
+              style="padding: 4px 8px; background: #6b7280; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 11px; font-weight: bold;"
+            >
+              −
+            </button>
+            <button
+              id="pdfZoomResetBtn"
+              style="padding: 4px 8px; background: #6b7280; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 11px; font-weight: bold;"
+            >
+              {Math.round(currentPdf.scale * 100)}%
+            </button>
+            <button
+              id="pdfZoomInBtn"
+              style="padding: 4px 8px; background: #6b7280; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 11px; font-weight: bold;"
+            >
+              +
+            </button>
+            <span style="font-size: 11px; color: #d1d5db; margin-left: 6px;">
+              {Math.round(currentPdf.scale * 100)}%
+            </span>
+          </div>
+          {#if !currentPdf.isImage && currentPdf.pages > 1}
+            <div style="display: flex; align-items: center; gap: 6px; margin-left: 12px;">
+              <button style="padding: 4px 8px; background: #6b7280; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 11px;">◀</button>
+              <button style="padding: 4px 8px; background: #6b7280; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 11px;">▶</button>
+              <span style="font-size: 11px; color: #d1d5db;">Page <span>{currentPdf.page}</span> / <span>{currentPdf.pages}</span></span>
+            </div>
+          {/if}
+        </div>
+        
+        <!-- Canvas Viewer -->
+        <div style="flex: 1; overflow: hidden; background: #111; display: flex; align-items: center; justify-content: center; width: 100%;">
+          <canvas
+            id="pdfCanvas"
+            style="max-width: 100%; max-height: 100%; object-fit: contain; background: white; cursor: grab; touch-action: none;"
+          ></canvas>
+        </div>
+      {:else if currentViewerFile.url}
         <iframe
           src={currentViewerFile.url}
           style="width: 100%; height: 100%; border: none;"

Mode2Svelte/src/routes/api/file-content/+server.ts

@@ -0,0 +1,62 @@
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from '@sveltejs/kit';
+
+/**
+ * Proxy endpoint to fetch file content from SharePoint
+ * Bypasses CORS restrictions by using backend authentication
+ */
+export const GET: RequestHandler = async ({ request, url }) => {
+  try {
+    // Get Graph token from request header or environment
+    const headerToken = request.headers.get('x-graph-token') || '';
+    const envToken = process.env.GRAPH_TOKEN || process.env.MS_GRAPH_TOKEN || '';
+    const token = headerToken || envToken;
+
+    if (!token) {
+      return json({ error: 'GRAPH_TOKEN missing' }, { status: 500 });
+    }
+
+    const driveId = url.searchParams.get('driveId');
+    const itemId = url.searchParams.get('itemId');
+
+    if (!driveId || !itemId) {
+      return json({ error: 'driveId and itemId required' }, { status: 400 });
+    }
+
+    // Fetch from Microsoft Graph API
+    const graphUrl = `https://graph.microsoft.com/v1.0/drives/${driveId}/items/${itemId}/content`;
+    const res = await fetch(graphUrl, {
+      headers: { Authorization: `Bearer ${token}` },
+    });
+
+    if (!res.ok) {
+      const text = await res.text();
+      console.error(`[file-content] Graph API error: ${res.status} - ${text}`);
+      return json({ error: `Graph ${res.status}: ${text}` }, { status: 502 });
+    }
+
+    // Get the content type and disposition headers
+    const contentType = res.headers.get('content-type') || 'application/octet-stream';
+    const contentDisposition = res.headers.get('content-disposition') || '';
+
+    const headers: Record<string, string> = {
+      'Content-Type': contentType,
+      'Cache-Control': 'public, max-age=3600',
+    };
+
+    if (contentDisposition) {
+      headers['Content-Disposition'] = contentDisposition;
+    }
+
+    // Return the file as a response
+    const buffer = await res.arrayBuffer();
+    return new Response(buffer, {
+      status: 200,
+      headers,
+    });
+  } catch (error) {
+    const message = error instanceof Error ? error.message : String(error);
+    console.error('[file-content] Error:', message);
+    return json({ error: message }, { status: 500 });
+  }
+};

Mode2Svelte/src/routes/api/file-pdf/+server.ts

@@ -0,0 +1,61 @@
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from '@sveltejs/kit';
+
+/**
+ * Proxy endpoint to fetch and convert Word documents to PDF
+ * Uses Microsoft Graph API with ?format=pdf parameter
+ */
+export const GET: RequestHandler = async ({ request, url }) => {
+  try {
+    // Get Graph token from request header or environment
+    const headerToken = request.headers.get('x-graph-token') || '';
+    const envToken = process.env.GRAPH_TOKEN || process.env.MS_GRAPH_TOKEN || '';
+    const token = headerToken || envToken;
+
+    if (!token) {
+      return json({ error: 'GRAPH_TOKEN missing' }, { status: 500 });
+    }
+
+    const driveId = url.searchParams.get('driveId');
+    const itemId = url.searchParams.get('itemId');
+
+    if (!driveId || !itemId) {
+      return json({ error: 'driveId and itemId required' }, { status: 400 });
+    }
+
+    // Use Graph API to convert to PDF format
+    const graphUrl = `https://graph.microsoft.com/v1.0/drives/${driveId}/items/${itemId}/content?format=pdf`;
+    const res = await fetch(graphUrl, {
+      headers: { Authorization: `Bearer ${token}` },
+    });
+
+    if (!res.ok) {
+      const text = await res.text();
+      console.error(`[file-pdf] Conversion failed: ${res.status} - ${text}`);
+      return json({ error: `PDF conversion failed: ${res.status}` }, { status: 502 });
+    }
+
+    const headers: Record<string, string> = {
+      'Content-Type': 'application/pdf',
+      'Cache-Control': 'public, max-age=3600',
+    };
+
+    // Update filename to .pdf if present
+    const contentDisposition = res.headers.get('content-disposition');
+    if (contentDisposition) {
+      headers['Content-Disposition'] = contentDisposition.replace(/\.(docx?)/gi, '.pdf');
+    }
+
+    console.log(`[file-pdf] Successfully converted: driveId=${driveId}, itemId=${itemId}`);
+
+    const buffer = await res.arrayBuffer();
+    return new Response(buffer, {
+      status: 200,
+      headers,
+    });
+  } catch (error) {
+    const message = error instanceof Error ? error.message : String(error);
+    console.error('[file-pdf] Error:', message);
+    return json({ error: message }, { status: 500 });
+  }
+};